setUp function
- dynamic body()
Registers a function to be run before tests.
This function will be called before each test is run. The body
may be
asynchronous; if so, it must return a Future.
If this is called within a test group, it applies only to tests in that
group. The body
will be run after any set-up callbacks in parent groups or
at the top level.
Each callback at the top level or in a given group will be run in the order they were declared.
Implementation
void setUp(dynamic Function() body) {
_maybeConfigureTearDownForTestFile();
_declarer.setUp(body);
}